There is an increasing number of buildings that require informed decisions to be made about their continued safety and serviceability. Although social and economic issues are often all-important influences, the technical issues nevertheless need to be addressed objectively, efficiently and reliably. The aim of this book is to bring together those techniques which can be used effectively to monitor building structures. The techniques, which include conventional surveying, photogrammetry, automatic and autonomous systems, and dynamic response, are the tools of principal practical value for monitoring building structures. Emphasis throughout is given to reliability, practicality, cost-effectiveness and the use of relevant examples.